Since their self-titled debut in 2009, The Pains of Being Pure at Heart have put out sunny indie-pop that's worthy of a smile on even the darkest Monday morning commute. Alex Naidus, the band's bassist, sent us a few of the songs that are in his earbuds when he's on the train. They're from all over the pop spectrum, and yet somehow they all make perfect sense. Have a listen and submit your playlist below!